The work aims to design a safe, reliable, widely applicable and recyclable, stacked return, suitable for different specifications of rolled goods and steel frame with lateral stopper seat frame in combination with the current mainstream steel frame and existing technical experience, to solve problems such as the lateral movement of rolled goods that often occurs during railway transportation, causing damage to the goods and endangering the safety of driving. According to the "Railway Cargo Loading and Strengthening Rules", a rolled cargo loading and strengthening scheme under the most unfavorable working conditions was formulated. According to the "Steel Structure Design Standard" and the open car and flat car structure, the structure and material of the steel frame was determined. Through SolidWorks-Ansys modeling and finite element analysis on the steel frame, the deformation and stress changes of the steel frame were obtained. The analysis showed that the steel frame was subject to vertical force and longitudinal force, the stress of the weakest part was 355.14 MPa and 341.99 MPa respectively, and the displacement and deformation were 0.55 mm and 1.069 mm respectively, which met the requirements. Under working conditions, the maximum stress of lateral stopper was 28.89 MPa, and the maximum deformation was 0.04 mm, which met the regulations. The railway horizontal limit steel seat frame is safe and reliable, which can effectively prevent the goods from moving laterally; Stacking and returning can realize repeated removal and return. It fills the gap that the existing steel seat frame cannot carry out lateral rigid reinforcement for rolled goods, which will greatly promote the development of the current roll cargo transportation.